In the production process of using sulfate tin plating brightener, we sometimes find that the plating solution becomes cloudy, what should we do?
Bigolly Technology made an analysis based on the field experience and the characteristics of the product's sulfate tin plating brightener Sn-807, there are mainly two methods:
1. The plating solution becomes milky due to too many hydrolyzates, which can be treated with a special purifying agent.However, this purifying agent is mainly a polymer flocculant, which will destroy the stability of colloidal ions and form agglomerates to precipitate.
2. The organic products in the plating solution accumulate too much and become turbid.In this case, the coating is still not bright after adding sulfate tin brightener.Organic impurities need to be treated by activated carbon adsorption. After treatment, a part of the brightener will be lost, and a certain amount of brightener needs to be added for adjustment.
It should be noted that the bath cannot be treated with hydrogen peroxide.Many operators are used to adding hydrogen peroxide (or potassium permanganate) first, and then adding activated carbon for treatment.However, the sulfate tin plating solution must not add oxidants such as hydrogen peroxide or potassium permanganate, which will oxidize the divalent tin in the plating solution to tetravalent tin.After the tetravalent tin is hydrolyzed, it will be converted into metastannic acid and suspended in the bath, making the bath turbid and the quality of the coating poor.
Therefore, when the plating solution becomes cloudy during the application of sulfate tin plating brightener, it is recommended to use activated carbon to treat the plating solution, which can appropriately prolong the service life of the plating solution and improve production efficiency.If you are interested in sulfate tin plating brightener, please contact Bigolly customer service, you can get free samples and detailed technical information!
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